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PDF Signet is a desktop application compatible with computers running the Mac operating system. The app comes sized at nearly 13 MB and requires your computer to be running version 10.7 or later of Mac OS X along with a 64 bit processor. The function of this nifty desktop application is to add digital signatures to your PDF documents. The app lets you use “Keychain” certificates (from the Mac OS) to digitally sign the PDF files that you have.

You can easily sign a PDF using your X.509 without any hassle whatsoever. To verify a signature, the process is even simpler than signing a PDF – all you have to do is drag and drop the to-be-verified PDF documents into the application’s window. This action quickly verifies and validates the signatures that are present on the document.

A bonus feature of the application is to let you automatically sign a PDF file as you are creating them – a feature many users will surely appreciate.

sign pdf documents mac

PDF Signet is available from the Mac App Store for $6.99. While this price is definitely an economical one, given the features of the application, you can still get the application for free, thanks to the generosity of its developers – they have offered 20 free promo codes to the first people who comment on this MakeUseOf post and share it on Facebook or Twitter.




  • A user friendly desktop app.
  • Compatible with Mac computers.
  • Lets you digitally sign PDF documents using Keychain certificates.
  • Can verify and validate signatures in a PDF file.

Check out PDF Signet @

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